Given that it was a defunct satellite, they are not operating. Celestrak.com has a nice box score of satellites by nation or agency (e.g. UN or NATO). The U.S. is certainly dominant, with most of its satellites active. Britain, man for man and dollar for pound, is about as good as the U.S. and most of its satellites are also active. Russia has filled the skies with space junk, and is responsible for something like 99% of all orbital debris, save that from the Chinese stunt where they deliberately intercepted one of their own defunct meteorological satellites.
EXCEPT for “the Chinese stunt where they deliberately intercepted one of their own defunct meteorological satellites.”
I might argue that the “Chinese Stunt” was more damaging because it is hard to track all the very small debris, and something untrackable can still do massive damage.
if there is a large war with countries shooting up satellites there could be so much debris we might be limited to low earth orbit for the duration of the human species